不同载液磁流体热弹流润滑性能对比
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The elastohydrodynamic lubrication moel of ferrofluid bearing is set up. Based on the Reynolds equation considering thermal, the elastohydrodynamic lubrication numerical simulation of ferrofluid bearing is carried out with multigrid method. The film thickness and the pressure of the ferrofluid with different base fluid ferrofluid bearings are compared. Through comparing the pressure and film thickness of ester-based H01 ferrofluid, alkyl-based E03 ferrofluid and water-based A01 ferrofluid, the further research of water-based ferrofluid is studied and the influence of the speed and load on water-based bearing lubrication film is discussed. The numerical results show that the pressure of ferrofluid has no change, but the film thickness are decreased; The pressure peak of the water-based ferrofluid is decreased with the increase of speed. The pressure at inlet region and the film thickness are increased with the increase of speed. The pressure of the water-based ferrofluid at inlet region is decreased with the increase of load, the pressure peak and the film thickness are decreased with the increase of load.建立磁流体润滑滑动轴承的弹流润滑模型。利用考虑热效应的雷诺方程,用多重网格法对磁流体润滑滑动轴承进行弹流润滑分析。比较不同载液磁流体润滑滑动轴承的润滑膜膜厚和压力分布。通过对比酯基H01磁流体、烃基E03磁流体和水基A01磁流体的润滑膜膜厚和压力,选择水基磁流体做进一步的研究,探究载荷和速度对水基磁流体润滑滑动轴承的润滑膜弹流性能的影响。结果表明:与等温条件下相比,不同载液磁流体润滑膜的压力没有变化,但是磁流体润滑膜的膜厚都减小;在不同转速条件下,水基磁流体润滑膜的入口区压力随着转速增加而增大,膜厚随着转速增加而增厚,压力峰随着转速增加而减小;在不同载荷条件下,水基磁流体润滑膜的入口区压力随着载荷增加而减小,膜厚随着载荷增加而减小,压力峰随着载荷增加而增大。
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